PS:- The code was from github at this url https://github.com/r-a-y/buddypress-followers/issues/68 but the link to the source code is no longer available with a 404 error, I had converted the code to a plugin earlier since last year.

I think this would be a great addon for the buddypress follow plugin.

Hello,

Brajesh i’m really interested in this code what does it do. can it be improved or merged into this code.
The code you posted only allows for email notification but no bp notification.

This code below has never worked for me can it be improved with your code into an addon

 /*
Plugin Name: BuddyPress Follow Notify
Description: This code will send an email and a BP notification to members when someone they are following publishes a post. There is a settings page in  WP Admin > Settings > Buddypress Followers Notify where you can set the Sender Name, Sender Email and select which post type to notify on.
Version: 1.1.0
*/

/*  Add settings page to WP Admin */
add_action( 'admin_menu', 'bp_follow_notify_add_admin_menu' );
add_action( 'admin_init', 'bp_follow_notify_settings_init' );
function bp_follow_notify_add_admin_menu(  ) { 
	add_options_page( 'Buddypress Folllowers Notify', 'Buddypress Folllowers Notify', 'manage_options', 'buddypress_folllowers_notify', 'bp_follow_notify_options_page' );
}
function bp_follow_notify_settings_init(  ) { 
	register_setting( 'pluginPage', 'bp_follow_notify_settings' );
	add_settings_section(
		'bp_follow_notify_pluginPage_section', 
		__( '', 'bp_follow_notify' ), 
		'bp_follow_notify_settings_section_callback', 
		'pluginPage'
	);
	add_settings_field( 
		'bp_follow_notify_sender_name', 
		__( 'Sender Name', 'bp_follow_notify' ), 
		'bp_follow_notify_sender_name_render', 
		'pluginPage', 
		'bp_follow_notify_pluginPage_section' 
	);
	add_settings_field( 
		'bp_follow_notify_sender_email', 
		__( 'Sender Email', 'bp_follow_notify' ), 
		'bp_follow_notify_sender_email_render', 
		'pluginPage', 
		'bp_follow_notify_pluginPage_section' 
	);
	
	add_settings_field( 
		'bp_follow_notify_post_types', 
		__( 'Post Types', 'bp_follow_notify' ), 
		'bp_follow_notify_post_types_render', 
		'pluginPage', 
		'bp_follow_notify_pluginPage_section' 
	);
}
function bp_follow_notify_sender_name_render(  ) { 
	$options = get_option( 'bp_follow_notify_settings' );
	?>
	<input type='text' name='bp_follow_notify_settings[bp_follow_notify_sender_name_render]' value='<?php echo $options['bp_follow_notify_sender_name_render']; ?>'>
	<?php
}
function bp_follow_notify_sender_email_render(  ) { 
	$options = get_option( 'bp_follow_notify_settings' );
	?>
	<input type='text' name='bp_follow_notify_settings[bp_follow_notify_sender_email]' value='<?php echo $options['bp_follow_notify_sender_email']; ?>'>
	<?php
}
function bp_follow_notify_post_types_render(  ) { 
	$options = get_option( 'bp_follow_notify_settings' );
	$args = array(
	   'public'   => true
	);
	$post_types = get_post_types( $args );
	?>
	<select name='bp_follow_notify_settings[bp_follow_notify_post_types][]' multiple='multiple'>
    <?php foreach ( $post_types as $post_type ) { ?>
    	<?php $selected = in_array( $post_type, $options['bp_follow_notify_post_types'] ) ? ' selected="selected" ' : ''; ?>
		<option value='<?php echo $post_type; ?>' <?php echo $selected; ?>><?php echo $post_type; ?></option>
    <?php } ?>
	</select>

<?php
}
function bp_follow_notify_settings_section_callback(  ) { 
	echo __( '', 'bp_follow_notify' );
}
function bp_follow_notify_options_page(  ) { 
	?>
	<form action='options.php' method='post'>
		
		<h2>Buddypress Folllowers Notify</h2>
		
		<?php
		settings_fields( 'pluginPage' );
		do_settings_sections( 'pluginPage' );
		submit_button();
		?>
		
	</form>
	<?php
}
add_action( 'new_to_publish', 'bp_follow_notify_author_followers', 99, 1 );
add_action( 'draft_to_publish', 'bp_follow_notify_author_followers', 99, 1 );
function  bp_follow_notify_author_followers( $post ){
	
	$options = get_option( 'bp_follow_notify_settings' );
	
	if ( !in_array( get_post_type(), $options['bp_follow_notify_post_types'] ) ) {
		return;
	}
				
	$author_id = $post->post_author;
	$author_name = get_the_author_meta( 'display_name' , $author_id );
	$counts  = bp_follow_total_follow_counts( array( 'user_id' => $author_id ) );
	
	if ( $counts['followers'] > 0 ) {
		
		$followers = bp_follow_get_followers( array( 'user_id' => $author_id ) )  ;
						
		foreach($followers as $follower){
			
			/* Email Notification */
			
			$user = get_user_by( 'id' , $follower );
			$follower_email = $user->user_email;
			$blog_name = wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES );
			$subject = '[' . $blog_name . '] New Post From ' . $author_name;
			
			$message = sprintf( __( '
				%2$s
				
				%3$s
				
				Link: %4$s
				-----------
				You are receiving this email because you are following %1$s.', 'bp-follow-notify' ),
					$author_name,
					$post->post_title,
					wp_trim_words( $post->post_content ),
					get_permalink( $post->ID )
				);
		
			$sender_name = ( !empty( $options['bp_follow_notify_sender_name']) ? $options['bp_follow_notify_sender_name'] : $blog_name );
			$sender_email = ( !empty( $options['bp_follow_notify_sender_email'] ) ? $options['bp_follow_notify_sender_email'] : 'no-reply@' . $blog_name );
		
			$headers = '';
			
			$headers  = "MIME-Version: 1.0" . "\r\n";
			$headers .= "Content-type: text/html; charset=" . get_bloginfo('charset') . "" . "\r\n";
			$headers .= "From: " . $sender_name . " <" . $sender_email . ">" . "\r\n";
			
 	
			if( wp_mail( $follower_email, $subject , $message, $headers ) ) {
				
				//echo "sending success";
			} else {
				
				//echo "sending failed";
			}	
			
			/* BP Notification */
			
			if ( bp_is_active( 'notifications' ) ) {
				
				bp_notifications_add_notification( array(
					'user_id'           => $user->ID,
					'item_id'			=> $post->ID,
					'secondary_item_id' => $author_id,
					'component_name'    => 'bp_follow_notify',
					'component_action'  => 'follow_new_post',
					'date_notified'     => bp_core_current_time(),
					'is_new'            => 1,
				) );
				
			}				
			
		} //end loop		
	} 	
	
 }
/*  Register component */
function bp_follow_notify_filter_notifications_get_registered_components( $component_names = array() ) {
	// Force $component_names to be an array
	if ( ! is_array( $component_names ) ) {
		$component_names = array();
	}
	
	array_push( $component_names, 'bp_follow_notify' );
	
	return $component_names;
}
add_filter( 'bp_notifications_get_registered_components', 'bp_follow_notify_filter_notifications_get_registered_components' );
/* Format screen notfications */ 
add_filter( 'bp_notifications_get_notifications_for_user', 'bp_follow_notify_format_notifications', 9, 5  );
function bp_follow_notify_format_notifications( $action, $item_id, $secondary_item_id, $total_items, $format = 'string' ) {
		
	if ( 'follow_new_post' === $action ) {
		
		if ( (int) $total_items > 1 ) {
			$title = sprintf( __( '%d new posts have been published', 'bp-follow-notify' ), (int) $total_items );
			$link  = bp_get_notifications_permalink();
		} else {
			$title = sprintf( __( '%s has published a new post.', 'bp-follow-notify' ), bp_core_get_user_displayname( $secondary_item_id ) );
			$link = get_permalink( $item_id );
		}
		
		// WordPress Toolbar
		if ( 'string' === $format ) {
			$return = apply_filters( 'bp_follow_notify_notification', '<a href="' . esc_url( $link ) . '" title="' . esc_attr( title ) . '">' . esc_html( $title ) . '</a>', $title, $link );
		// Deprecated BuddyBar
		} else {
			$return = apply_filters( 'bp_follow_notify_notification', array(
				'text' => $title,
				'link' => $link
			), $link, (int) $total_items, $title, $title );
		}
		
		return $return;
		
	}
	
	return $action;
}